PHP表单没有POST文件

Question

好的，所以我知道在这个主题上已经有很多问题，但他们的解决方案都没有对我有用。我已经验证file_uploads已打开，并且我的文件未超过文件max。当我提交表单时，POST数据包含除文件字段之外的所有内容，我无法弄清楚原因。我从PHP脚本获得的响应也不包括文件数组长度的值1，并且不包括用于成功移动文件的1。似乎文件从未发布过。我的想法已经不多了，非常感谢任何帮助。

HTML：

  <form enctype="multipart/form-data" action="/RK/submitQuestion.php" method="post">
    <table>
      <tr>
        <td>
          <h2>Personal Info</h2>
        </td>
      </tr>

      <tr>
        <td>First Name:</td>

        <td><input type="text" id="submitFirstName" name="submitFirstName" /></td>
      </tr>

      <tr>
        <td>Last Name:</td>

        <td><input type="text" id="submitLastName" name="submitLastName" /></td>
      </tr>

      <tr>
        <td>Email:</td>

        <td><input type="text" id="submitEmail" name="submitEmail" /></td>
      </tr>

      <tr>
        <td>
          <h2>Question</h2>
        </td>
      </tr>

      <tr>
        <td>Please enter your question here:</td>

        <td>
        <textarea name="submitComments" style="resize: none;" rows="5">
</textarea></td>
      </tr>

      <tr>
        <td>Attachment:</td>

        <td><input type="file" id="submitUserFiles" name="submitUserFiles" multiple=
        "multiple" /></td>
      </tr>

      <tr>
        <td><input type="submit" /></td>
      </tr>
    </table>
  </form>

PHP：

<?php
if (array_key_exists('submitUserFiles', $_FILES)) {
    //Loop through each file adding its location to an array
    $len = count($_FILES['submitUserFiles']['name']);
    echo $len;
    for ($i = 0; $i < $len; $i++) {
        $tmp_name = $_FILES['submitUserFiles']['tmp_name'];
        $name     = $_FILES['submitUserFiles']['name'];
        echo move_uploaded_file($tmp_name, 'C:\\inetpub\\wwwroot\\uploads\\' . $name);
        $mail->addAttachment('C:\\inetpub\\wwwroot\\uploads\\' . $name);
    }
}
if (!$mail->send()) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
    exit;
} else {
    echo 'Thank you for your question. Your message has been sent. Redirecting you back to where you were.';
}
?>

POST数据：

PHP响应：

Thank you for your question. Your message has been sent. Redirecting you back to where you were.

我期待看到的是：

11Thank you for your question. Your message has been sent. Redirecting you back to where you were.